How to get a count of -Python- threads from the outside (or via code instrumentation) - Printable Version +- Python Forum (https://python-forum.io) +-- Forum: Python Coding (https://python-forum.io/forum-7.html) +--- Forum: General Coding Help (https://python-forum.io/forum-8.html) +--- Thread: How to get a count of -Python- threads from the outside (or via code instrumentation) (/thread-19809.html)

How to get a count of -Python- threads from the outside (or via code instrumentation) - dstromberg - Jul-15-2019 Detailed description of your problem, including steps to reproduce it This is more informational, than a problem. I want some way of identifying which of my program's many threads are coming from CPython, and which are coming from C/C++ extension modules. I can tell my program has a couple dozen threads by looking at it in csysdig on a Linux system. What steps have you tried? What was the outcome? I've googled a lot, but I keep getting tutorials about threading, not how to tell Python threads from C/C++ threads. I've got this question at stackoverflow too: https://stackoverflow.com/questions/56958009/how-can-i-tell-how-many-python-threads-a-process-has-from-the-outside So far it has no answers. Full traceback verbatim or other error you receive The "error" is that the application is much slower than it seems like it should be, even though the CPU load and I/O load on the machine are both low. But this post is mostly about the thread question. System info, python version, operating system, etc. Python 2.7.12 (I know; we're working on upgrading to 3.x) Ubuntu 16.04.6 LTS